Oven-door.



No. 858,132. PATENTED JUNE 25 1907.

- F. J; ALBRECHT.

OVEN DOOR.

APPLICATION IILEDJAH. so, 1906.

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No.858,132. PATENTEDJUNB25,1907.

' F.J..ALBREGHT. Q

OVEN D0011. APPLIOATION FILED JAILBO, 1906.

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No. 858,132. PATENTED JUNE 25, 1907. F. J. ALBRECHT. OVEN DOOR. APPLICATION FILED IAIL30, 1906.

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I THE NORRIS Psrrns ca, WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

OVEN-DOOR.

Specification of Letters Patent.

Patented.1une 25,1907.

Application filed January 30, 1906. Serial No. 298,675.

To all whom, it may concern.-

Be it known that I, FRANCIS J. ALBRECHT, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Oven-Doors, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in oven doors for bakery ovens, and the invention has for its primary object the provision of novel means for easily and quickly opening and closing the door of a bakers oven.

The invention aims to provide a novel door frame and doors for a bakers oven, wherein positive and reliable means are employed for easily and quickly manipulating the main doors of the oven. In connection with the doorframe, compartments are provided on each side thereof for the housing of a burner or lamp and a pyrometer. To this end, I have devised novel means for simultaneously opening the door'of the burner or lamp compartment and controlling the burner or lamp, the mechanism employed to accomplish this being inexpensive and of such a construction as to be particularly adapted for use in connection with oven doors.

The-invention also embodies novel means for automatically controlling a sight shutter and the dampers of two flues, which are essential in the construction of bakers ovens.

Throughout the entire construction of my improved oven doors, I employ simple and inexpensive castings that are assembled to form a door way and numerous appurtenances thereof, which are constructed and arranged to withstand the intense heat to which they are subjected, during the operation of an oven.

With the above and other objects inview which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts to be hereinafter more fully described and claimed, and referring to the drawing accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which:-

Figure 1 is a front elevation of my improved oven door and door way or frame,

ig. 2 is a fragmentary perspective view of a portion of the door way or frame, illustrating a sight shutter and the main door guide way, Fig. 3 is a perspective view of a damper bracket, Fig. 4 is a perspective view of dampers used in connection with my improved oven door, Fig. 5 is a fragmentary perspective view partly in section of the door way or frame, illustrating a burner or lamp compartment thereof, Fig. 6 is a perspective .view of one of the main door operating levers, Fig. 7 is a similar view of the other main door operating lever, Fig. 8 is a detail perspective view of a closure lid used in connection with the burner or lamp compartment, Fig. 9 is a fragmentary vertical sectional view of the lamp or burner compartment illustrating the observation opening of said compartment, Fig. 10 is a rear elevation of the oven door and its door way or frame, Fig. 11 is a perspective view of a fork comprising a portion of the mechanism employed for controlling the lamp or burner used in connection with the oven door, Fig. 12 is a perspective view of the main door guide way, Fig. 13 is a perspective view of a weighted rod used in supporting the main oven door, Fig. 14 is a perspective view of the main door, Fig. 15 is a perspective view of an oven front, showing my improved oven door in the closed position.

To put my invention into practice, I construct my improved door, and door way or frame of a plurality of castings Which are assembled in the brick work of a bakers oven first shown in Fig. 15. The door way or frame is formed of two side plates 1 and 2 carrying a transverse cross head 3, which is provided with a depending curved shield 4, the ends of which are slotted as at 5, 5. The side plates 1 and 2 are provided with vertically disposed guide ways 6, 6 and are connected at their lower ends by a bar or plate 7. Mounted to slide in the guide Ways 6, 6 is a door 8 carrying a vertically disposed bracket 9 upon its front face which projects slightly above the door and is provided with a guide frame 10, the object of which will be pres- 'ently described. That portion of the bracket mounted upon the door is provided with a vertically disposed guide-rib 11 which is engaged by a grooved roller 12 journaled in a bearing 14, carried by a rod 15, which is journaled in the side frames 1 and 2, the one end of said rod being provided With an an gularly disposed weight 16 adapted to maintain the roller 12 in engagement with the guide-rib 11, thereby forcing the door 8 in engagement with the guide ways 6, 6, yet

permitting of the door receding should occasion demand. It is a well known fact that oven doors are subjected to an intense heat, which tends to warp, distort and expand the material from which the doors are made, and in this connection, considerable trouble has been experienced in the oven doors becoming wedged within their respective door ways, and extremely difficult to manipulate. Between the guide ways 6, 6 and the side plates 1 and 2, I leave suflicient space for the expansion and distortion of the door, and maintain means in connection with the door, whereby it will be normally held in engagement with its guide ways, thus providing a snugly fitting door adapted to prevent heated air and steam from escaping-from the oven.

The side edges of the plates 1 and 2 are flanged as at 17, 18, and have their rear faces provided with ribs 19. The flanges 18 of the side plates form the inner side walls of two compartments 20 and 21, the outer walls 22,

22 of the compartments being secured to the ribs 19 of the side plates 1 and 2. The flange 18 and the outer wall 22 of each compartment is provided with a rear wall 23, which is suitably secured to the flange 18, and the wall 22 of each compartment. The outer walls 22 are of a greater width than the flanged or inner wall 18, consequently the rear walls 23 will be positioned at an angle to the door 8 and its appurtenant parts, as shown in Figs. 5 and of the drawings. The upper edges of the rear walls 23 are flanged as at 24, and secured to the inner edges of said flanges, also to the flange 19, as at 25, is a curved transversely arranged shield plate 25 carrying a longitudinally disposed rib 26.

Centrally of the shield plate 25 is formed a sight opening 27, the sides of which are flanged as at 28, 28, and secured to the upper edges of said flanges is a plate 29 carrying a vertically disposed guide way 30, upon which the guide frame 10 is adapted to slide. The upper end of the guide way is provided with a pierced lug 31 by which the guide way is secured to the cross head 3, as at 32.

The guide frame 10 directly above the rib 11 is provided with an outwardly extending pin 33 upon which is pivotally mounted the ends 34, 34 of door operating levers 35 and 36,

, said levers being slightly bent in order that they may pass through the slots 5, 5 of the shield 4, and extend outwardly upon each side of the door 8 above the side plates 1 and 2. The levers 35 and 36 are fulcrumed in the lower ends of links 37, 37, which are pivotally connected to the cross head 3, as at 38, 38. Each link consists of two straps which are secured together, as shown in Figs. 1 and 6. The outer ends of the levers 35 and 36 are provided with a conventional form of handles 39, 39 and adjacent to the fulcrum point of said levers are provided with guide lugs 40, 40 adapted to engage the flanges 17,17 of the side plates 1 and 2 and guide the levers when manipulated to raise and lower the door 8.

The shield plate 25 is provided with a longitudinally disposed rib 41 adjacent to the flanges 28, 28, and with stop lugs 42, 42 at each end of the rib 41. Slidably mounted upon the shield plate 25 between the vertical edges of the flanges 28, 28 and the rib 41 is a shutter 43 carrying pins 44, 44 whereby the same may be manually moved. The shutter 43 is provided with a sight opening 45 adapted to register with the opening 27 of the shield plate 25, whereby the interior of an oven may be observed at any desired time,

without opening the door 8.

The guide way 30 is provided with a rearwardly extending damper'bracket 46 having bearings 47, 47 for a shaft 48, carrying dampers 49, 49. One of the dampers is provided with screws 50, 50 to whicha forwardly extending arm 51 is attached, the end of this arm lying directly above and in close proximity to the edge 52 of the guide frame, whereby when the door 8 is elevated, the guide frame will strike the arm 51 and open the dampers 49, 49. These dampers are adapted to control flues or openings (not shown) which are mounted in the brick work of an oven that supports my improved door and door way or frame. It is the common practice to provide flues adjacent to oven door ways, whereby when the door of an oven is opened a draft will be created which will prevent odors, hot air and steam from being ejected from the door way, the draft causing the steam to pass upwardly in the flues mentioned.

The side plate 1 forming the front wall of the compartment 21 is provided with an opening 53, to accommodate a conventional form of pyrometer generally used in connection with ovens for determining the tem perature of the interior of the oven.

The side plate 2 forming the front wall of the compartment 20, which I have termed the lamp or burner compartment, is provided with an opening 54 normally closed by a hinged door 55. The rear wall 23 of said compartment is provided with two openings 56 and 57, the opening 56 being provided with a hinged lid 58 carrying a rearwardly extending pierced and slotted lug 59, which protrudes through the opening 57 of the rear wall 23. The side wall 2 adjacent to the opening 54 is provided with a slot 60 through which extends a lever 61 that is connected by a closure plate 62 with a lever 63 pivotally connected to the lug 59 of the closure lid 58. The lever 61 is notched, as at 64 and provided with an enlargement 65 having an opening 66 formed therein, the object of which will be presently described. The lever 61 is employed for opening the closure lid 58,

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this beingaccomplished by pushing inwardly upon the lever until the notch 64 engages the lower edge of the slot 60, whereby the closure lid 58 will be maintained in. an open position. To prevent the heated air and steam within the oven from passing through the openings 56 and 57, when the closure lid 58 is opened, I provide the opening 56 with a transparent sheet of mica 67, while the opening 57is closed by the plate 62 carried by the lever 61.

The side plate 2 directly beneath the hinged door 55 is provided with a plurality of openings 68, and extending through one of said openings is a gas supply pipe 69 carrying a conventional form of valve 70, which controls the admission of gas to a mantle burner 71 supported by the inner end of the gas supply pipe 69. A reflector 72 is supported adjacent to the mantle burner 71, whereby when the closure lid 58 is opened, the light of the mantle burner will be reflected into the oven. The mantle burner 71 and the reflector 72 are employed to illuminate the interior of the oven, which is essential when the condition of the bread or rolls being baked within the oven is to be observed or the bread or rolls are to be withdrawn therefrom. It is a well known fact that in the baking of French rolls or bread that steam is injected into the oven to produce the hard crust and conditions common to French rolls and bread. As the steam which hovers over the rolls or breadwould prevent the condition of the rolls or bread from being observed, it has been necessary to provide the burner in order that the rolls or bread may be observed from time to time, also to provide suflicient light in order that all partsof the oven may be observed and conveniently reached when withdrawing a baking from the oven.

It will be apparent that it is not necessary for the burner or lamp used in the compartment 20 to at all times burn, therefore I have devised means for controlling the admission of gas to the burner, said means being actuated when the lid 58 is opened, to permit a greater flow of gas to the burner. This is accomplished by providing the burner 71 with a pilot light and the stop cook 73 of the valve with an outwardly extending fork 74, the bifurcated end 75 of which engages a headed pin 76 secured in aperture 66 of the enlargement of the lever 61, whereby when the lever 61 is moved to open the lid 58, the valve 7 0 will be further opened to permit of a full illumination of the burner 71 and its mantle, while when the lid is closed, the supply of gas to the burner will be reduced to simply maintain a pilot light.

In operation, it will be observed that by pulling downwardly upon either one of the levers 35 or 36, the door 8 will be elevated, said door being guided in its movement and serving to open the dampers 49. Through I am aware of oven doors having been devised which are raised and lowered and in connection with which a lamp or burner is used, but considerable trouble has been experienced owing to the intense heat to which the door is subjected andthe destruction of mantles or lamps used in connection with such doors. The present invention aims to obviate the above defects by providing a simple and effective structure such as I have shown and described.

I do not care to confine myself to the size and proportion and the minor details of construction, as the door and its door way frame may be slightly modified to conform to the various oven structures at present used. Such other changes, as are permissible by the appended claims, may be resorted to without departing from the spirit and scope of the invention.

What I claim and desire to secure by Letters Patent, is 1 1. An oven door embodying side plates having openings formed therein, a transverse shield carried by said side plates, a door slidably mounted between said side plates, a bracket carried by said door and projecting above the same, a guide-frame on the upper end of said bracket, and a guiderib on the outer face of the bracket, a rod journaled in the side plates and having a roller engaging said guide-rib compartments formed in the rear of said side plates and embodying rear walls, said walls having openings formed therein, a curved plate supported by said rear walls, said plate having a sight opening formed therein, a movable shutter carried by said plate adjacent to said opening, a guide way supported by said plate and said shield, and receiving the guide-frame of said bracket, links carried by said shield, levers fulcrumed in said links and pivotally connected to said guide frame, a closure lid hinged to the rear of one of said compartments, a lever connected to said closure-lid and extending through the side plate of said compartment, a gas burner mounted in said compartment and having a suitable gas supply pipe, movable dampers carried in brackets on said guide way, means actuated by the movement of said closure lid lever to control the admission of gas to said burner, means comprising a lever carried by one of said dampers and actuated by the raising of said door .to move said dampers, and means to guide said door in its movement, substantially as described.

2. In an oven front, two side-plates having guide-Ways on their inner edges, a door mounted for vertical movement in said guide-Ways, a bracket secured to the outer face of said door and having a vertically-disposed guide-rib, a rod j ournaled in the sideplates having a Weight on one end and having a roller engaging said guide-rib, a guideframe carried on the upper end of said bracket, a shield-plate secured to the inner faces of said side-plates and provided on its upper face With transverse vertically-disposed-flanges, a plate 29 secured to said flanges and provided with a vertically-disposed guide-way receiving the guide-frame of said bracket, a pin carried by said guide- -frame, levers connected to said pin for elevating the door, a damper-bracket carried by the guide Way of said plate 29, dampers carried in said damper-bracket, and a lever carried by one of said dampers to be engaged by the door as the latter is elevated to simultaneously operate the dampers.

In testimony whereof I afiix my signature in the presence of tWo Witnesses.

FRANCIS J. ALBRECHT. Witnesses:

K. H; BUTLER, E. E. POTTER. 

